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A206379 Number of (n+1)X5 0..3 arrays with every 2X2 subblock having the same number of equal diagonal or antidiagonal elements, and new values 0..3 introduced in row major order 1
5257, 520097, 57656713, 6554439373, 748963157161, 85678539791333, 9803619036105721, 1121819841273065957, 128370307988576256937, 14689502396007272718677, 1680930696757228231925017 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
Column 4 of A206383
LINKS
FORMULA
Empirical: a(n) = 160*a(n-1) -5537*a(n-2) +25556*a(n-3) +1495902*a(n-4) -23370552*a(n-5) +81849864*a(n-6) +544237824*a(n-7) -5119960320*a(n-8) +15199301376*a(n-9) -19180578816*a(n-10) +8497004544*a(n-11)
EXAMPLE
Some solutions for n=4
..0..1..1..1..0....0..1..0..0..0....0..1..0..0..0....0..0..1..0..2
..2..2..3..2..3....1..1..1..0..2....1..1..1..0..3....1..2..1..3..2
..3..0..0..0..1....3..1..2..1..0....2..1..2..1..0....0..3..0..0..2
..3..1..1..2..1....1..2..2..2..1....2..2..2..2..1....1..1..1..1..1
..3..0..3..0..3....0..1..2..0..2....0..2..0..2..2....2..2..2..2..0
CROSSREFS
Sequence in context: A124658 A256745 A206165 * A234229 A143936 A204281
KEYWORD
nonn
AUTHOR
R. H. Hardin Feb 07 2012
STATUS
approved

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Last modified March 28 08:22 EDT 2024. Contains 371236 sequences. (Running on oeis4.)